The larvae are apparently restricted to cold, rapidly 

 flowing streams in mountainous regions. 



Key to Adult Moles 



1. Apex of lOthtergite directed dorsad or ventrad; claapers 

 without mesal spines 2 



— Apex of 10th tergite held horizontally; claspers with 

 long, black mesal spines or spurs 3 



2. Apex of 10th tergite directed dorsad, aedeagus with a 

 pair of sinuate lateral processes .... scylla Milne 1935 



— Apex of 10th tergite directed ventrad; aedeagus with 

 a pair of sinuate lateral processes hooked apically 

 (fig. 10:29/); Lassen County bilera Denning 1951 



3. Clasper with a single, stout, mesal seta; aedeagus 

 bearing a pair of stout spines near apex (fig. 10:29&) 

 Inyo County conspersa Banks 1907 



— Clasper with 2 or more stout, mesal spines; aedeagus 

 terminating in an ovate apex with a mesal notch .... 4 



4. Claspers short, almost as wide at base as long (fig. 

 10:29Z); Placer, Plumas, Lassen, and Tuolumne 

 counties simulate Banks 1920 



— Claspers long, twice as long as width of base 



maculosa Banks 1907 



263 

 Denning: Trichoptera 



distribution. Only two species are known from the 

 United States. The ono California species is »/. 

 flexuosa Ulmor 1905 (fig, 10:306) (Monterej and 

 Ventura counties). 



Genus Namamyia Banks 1905 



The only species in this genus was described from 

 California. It is N. plutonis Banks 1905 (fig. 10:30c) 

 (Butte, Humboldt, Shasta, and Tuolumne counties). 



Genus Nerophilus Banks 1899 



The only species in the genus is N. californicus 

 (Hagen) 1861 (fig. 10:30d) (Tehama, Alpine, Tulare, 

 Sonoma, Napa, and Solano counties). It is a fairly 

 large species and is well distributed throughout 

 Oregon and California. 



Genus Hydatophylax Wallengren 1891 



Members of this genus are large, and the wings usu- 

 ally have a distinct pattern. The dorsal surface of 

 the eighth tergite is reticulated. Three Nearctic spe- 

 cies are known but only one, H. hesperus (Banks) 

 1914 (fig. 10:31c), has been reported from "Sutley," 

 California. 



Family 0D0NT0C ERIDA E 



This is a small family with but five genera, four of 

 which are western and one, P silotreta, apparently 

 restricted to the East. Larvae of only one species, 

 Psilotreta frontalis Banks, have been described. 

 The California fauna contains four genera and four 

 species. 



Key to Genera 



Adults 15 



1. Apex of fore wing rounded 2 



— Apex of fore wing oblique, wings narrow 



Marilia Miiller 1878 



2. Cell R 4 not pedicellate in fore and hind wings 3 



— Cell R« pedicellate in fore and hind wings 4 



3. Rj not fused with R 2 at tip in fore and hind wings . . . 



Nerophilus Banks 1899 



— R! fused with R 2 at tip in fore and hind wings 



Namamyia Banks 1905 



I 4. Cerci long, prominent; 10th tergite bearing a pair of 



hooks Psilotreta Banks 1899 



. — Cerci short, slender; 10th tergite with no hooks .... 



Parthina Denning 1954 



Genus Marilia Muller 1878 

 Most of the species of the genus are southern in 



15 Adapted from Betten (1934). 



Genus Parthina Denning 1954 



Only a single species has been placed in this genus. 

 It is P. linea Denning 1954 (fig. 10:316) (Tuolumne 

 County). 



Family CALAMOCERATIDAE 



The family is represented by four genera; two are 

 eastern and two are essentially southwestern and 

 western in distribution. There are only six species 

 in the family. The known California fauna consists 

 of one genus with one species. 



Key to the Genera 

 Adults" 



1. Cell R 2 present in hind wing; no furrow of scales in 

 fore wing of males 2 



— Cell R 2 not present in hind wing; a furrow of scales 

 present in fore wings N otiomyia Banks 1905 



2. R, of fore wings not fused with R 2 at tip 3 



— R t of fore wings fused with R, at tip 



Ganonema McLachlan 1866 



3. Spurs 2-4-3 or 1-4-2; 2nd segment of maxillary palpus 

 short Anisocentropus McLachlan 1863 



— Spurs 2-4-2 or 2-4-4; 2nd segment of maxillary palpus 

 long Heteroplectron McLachlan 1871 



Genus Heteroplectron McLachlan 1871 



The only species in this genus is H. californicum 

 McLachlan 1871 (fig. 10:31a) (northern California). 

 It is well distributed throughout the northern part 

 of the state and has been recently taken in Fresno 

 County. 



s Adapted from Betten (1934). 



